The Return of the Legendary All-Master - Chapter 49

Finn travels to the timeline after Avengers: Endgame and obtains a system that hides one's own strength while allowing him to grow even stronger!However, he soon discovers that the system's prescribed hiding place is actually Westview!Before long, Wanda will seize control of the entire town, plunging countless people into pain and torment.Fearing exposure and determined not to give up halfway...Finn decides to act first—conquer Wanda and resolve the issue at its root.And thus, he embarks on a road of no return.Here's the cliched NOTE : English is my 3rd language so I'm not proficient in that , so if there are any mistakes please point it out to me

The world is in chaos, and evil spirits appear everywhere, causing chaos in the world and poisoning the people.

The imperial court set up a special department for subduing demons, recruiting strange people, Buddhist monks and monks from all over the world to work together to slay demons and subdue demons.

Ning Xiu was reborn with a proficiency panel and practiced martial arts exercises hard, just to have the power to slay demons in this world of demons, suppress the universe, and protect the peace and prosperity of the human race.

[Tianwang King Kong Gong: Twenty Layers (99999/99999)] The blood is like a furnace, burning the river to boil the sea

[Dragon and Elephant Prajna: Eighteenth Floor (81111/88888)] Raise the peaks with both arms and move the mountains to remove the ridges

…

Ning Xiu: “My strength is all based on hard work every day, rain or shine.”

- Description from novelbuddy

Growing up in poverty, Sunny never expected anything good from life. However, even he did not anticipate being chosen by the Nightmare Spell and becoming one of the Awakened - an elite group of people gifted with supernatural powers. Transported into a ruined magical world, he found himself facing against terrible monsters - and other Awakened - in a deadly battle of survival.
What's worse, the divine power he received happened to possess a small, but potentially fatal side effect...

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.